Improvement in side-sticks and quoins



YT. MCGRATH. `SideSticks and uuins. No'.`l33,`948. Patented Dec.17,1872.

PATENT rrIcE.

THOMAS MOGLI-ATH., OF ALBANY, NEW YORK.

IMPROVEMENT IN SIDE-.STICKS vAND QUOINS.

Specification forming part of Letters Patent No. 133,948, dated December17, 1872.

q vTo all whom it may concern:

Beit known that I, THOMAS MGGRATH, of

f `the city and county of Albany, State of New York, have inventedcertain new and useful Improvements in Side or'Foot Sticks and Quoinsfor Ghases; and I do hereby declare that the following is a descriptionthereof,

reference being had to the accompanying drawing forming a part of thisspecification, in which- Y n' Figure 1 represents a section of a chase,

form, side-stick, foot-stick, and their quoins, illustrating theimprovements in this invention; Fig. 2 is a sectional view of a sectionof the improved side-stick and quoin, on an enlarged scale; and Fig. 3is a view of the same y on a smaller scale.

My invention relates to the side-sticks, footsticks, and quoins forlocking up the printers forms; and consists in constructing thesidesticks and foot-sticks with a series of regular and equal inclinedfaces, arranged on the side opposite thestraight-face side of the saidstick in groups of two or more, so placed that the inclines of one groupwill be in opposition to the inclines of its connective group, and informingthe quoins-of metal in groups of two or more inclines-of an anglecorresponding with the l o. angles of the inclines made on theside-stick (or foot-stick) with which the said quoins are to act, andcombining with the said quoins an operating screw-shaft provided with arightand-left-hand screw-thread, in such a manner as to move the saidquoins in pairs in either direction, so as to be capable of widening thespace between the straight face of the sidestick and the rear face ofthe quoins, or to contract the same according to the direction the saidscrew-shaft is turned; the object of Y this invention being to enablethe printer to lock up the form in the chase in an expeditious,

t. rrn, and even manner.

Tov enable others skilled in the art to make 'l and use my invention, Iwill proceed to describe it in reference to the drawing and the Yvletter-sof reference marked thereon, the same letters indicating likeparts.

Inthe drawing, A represents the chase; B

n' are the usual rules; O is the side-stick; C is the foot-stick. Theside-stick is made with the usualstraight-face side a, Figs. 2 and 3,preferably of wrought-iron or steel, andof a length proper-to adapt-ittothe chase it is to be used with.J Made with the said side-stick arethe series of inclined faces b b and b b', arranged on the side of thestick opposite the straight face a, as shown in Figs. l and 3. The saidinclined faces are arranged in groups of two or more series or steps insuch a manner that the faces of each incline b b of one group will runin a direction opposite to the inclines b bf of its connective group, asshown; and the angles of all the said inclines of both groups are to bemade equal and uniform, as show n. D D are the quoins which consist ofmetal pieces, having two or more incline faces, c c and c c', havingangles in opposite directions, but corresponding with the angles of thefaces of the inclines b and b', against which the inclines c c are tocontact. E is a shaft provided on one end with a right screw-thread, d,

which works in a corresponding screw-thread made in the base end of thequoin D, While the opposite end is provided vwith a left-handscrew-thread, d', which works in the base of the quoin D', as shown. Thecentralv portion of the said screw-shaft is provided with milled ringsce, which will enable the person to operate the said screw-shaft by hisfingers until it becomes tightened, and between 'the said milled ringsare several holes, e e', which are intended to receive any suitablewrench-pin, which may be used to further turn the said screw-shaft tocrowd the quoins outward, or to draw them in.

A When the quoins D are arranged with the side or foot stick C so thatthe full face ofthe inclines c or c' contact with all the surface ofinclines b or b', and the screw-threads d d are entered in theirrespective quoins, as in Fig. 2, the distance between the straight facea of the stick C and the straight faces of the quoins D Dl will be ofthe least width across, and when the screw-shaft E is revolved in such amanner as to throw the quoins from each other the inclines c and c willeach ride up the inclines b b of the stick, and thereby en large thecross-width of the pieces between the straight faces of the said stickand quoin, as shown in Figs. l and 3, when the straight faces of thequoins will be made to crowd against the pieees comprising the said formin ay tight and firm manner, and With uniform pressure in every part,When the form is thus looked.

Where the forms to be locked are of small dimensions I would use theside and foot sticks With two opposite groups of two inelines eaeh7 asshown in the foot of the form in Fig. l, and would use quoins tocorrespond; and Where the form to be looked is larger I would use ineach group three or more inelines With quoins having inelines tocorrespond, as shown; with very large forms I Would use with theside-stick several groups of pairs of opposite inelines with severalpairs of quoins, as in Fig. 3.

By the improvements in this invention the forms can be locked up in aperfectly square manner and with an even pressure on every l HSILSMS setforth.

THOMAS MCGRATH.

Witnesses ALEX. SELKIRK, H. C. RADLEY.

